The Checkout Field Editor (Checkout Manager) for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom radio and checkboxgroup field values submitted through the WooCommerce Block Checkout Store API in all versions up to, and including, 2.1.7. This is due to the prepare_single_field_data() method in class-thwcfd-block-order-data.php first escaping values with esc_html() then immediately reversing the escaping with html_entity_decode() for radio and checkboxgroup field types, combined with a permissive wp_kses() allowlist in get_allowed_html() that explicitly permits the ` element with the onchange` event handler attribute. This makes it possible for unauthenticated attackers to inject arbitrary web scripts via the Store API checkout endpoint that execute when an administrator views the order details page.
CVE-2026-3231
Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-03-11. NVD baseline CVSS 7.2; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.2
- EG Score
- 7.2(medium)
- EG Risk
- 48(Track)EG Risk 48/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity72% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 25%
- KEV
- Not listed
Published
March 11, 2026
Last Modified
June 17, 2026
References (6)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/woo-checkout-field-editor-pro/tags/2.1.7/block/class-thwcfd-block-order-data.php#L437
- security@wordfencehttps://plugins.trac.wordpress.org/browser/woo-checkout-field-editor-pro/tags/2.1.7/block/class-thwcfd-block.php#L388
- security@wordfencehttps://plugins.trac.wordpress.org/browser/woo-checkout-field-editor-pro/tags/2.1.7/includes/utils/class-thwcfd-utils.php#L476
- security@wordfencehttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3478914%40woo-checkout-field-editor-pro%2Ftrunk&old=3454287%40woo-checkout-field-editor-pro%2Ftrunk&sfp_email=&sfph_mail=#file1
- security@wordfencehttps://research.cleantalk.org/cve-2026-3231/
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/df406e59-94d9-4704-82a3-02c2c1773c82?source=cve
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 36× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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Frequently asked(5)
What is CVE-2026-3231?
When was CVE-2026-3231 disclosed?
Is CVE-2026-3231 actively exploited?
What is the CVSS score of CVE-2026-3231?
How do I remediate CVE-2026-3231?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-3231
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